/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *	  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.sirona.store.tracking;

import org.apache.sirona.configuration.Configuration;
import org.apache.sirona.configuration.ioc.Created;
import org.apache.sirona.store.BatchFuture;
import org.apache.sirona.util.DaemonThreadFactory;

import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 */
public abstract class BatchPathTrackingDataStore
	extends InMemoryPathTrackingDataStore
{

	private static final Logger LOGGER = Logger.getLogger( BatchPathTrackingDataStore.class.getName() );

	protected BatchFuture scheduledTask;

	@Created // call it only when main impl not in delegated mode so use IoC lifecycle management
	public void initBatch()
	{
		final String name =
			getClass().getSimpleName().toLowerCase( Locale.ENGLISH ).replace( "pathtrackingdatastore", "" );

		final long period = getPeriod( name );

		final ScheduledExecutorService ses =
			Executors.newSingleThreadScheduledExecutor( new DaemonThreadFactory( name + "-pathtracking-schedule-" ) );

		final ScheduledFuture<?> future =
			ses.scheduleAtFixedRate( new PushPathTrackingTask(), period, period, TimeUnit.MILLISECONDS );

		scheduledTask = new BatchFuture( ses, future );
	}

	protected int getPeriod( final String name )
	{
		int period = Configuration.getInteger( Configuration.CONFIG_PROPERTY_PREFIX + name + ".pathtracking.period", //
										 Configuration.getInteger(
											 Configuration.CONFIG_PROPERTY_PREFIX + name + ".period", 60000 ) );

		return period;
	}


	private class PushPathTrackingTask
		implements Runnable
	{
		@Override
		public void run()
		{
			try
			{
				pushEntriesByBatch( getPointers() );
				clearEntries();
			}
			catch ( final Exception e )
			{
				LOGGER.log( Level.SEVERE, e.getMessage(), e );
			}
		}
	}

	protected abstract void pushEntriesByBatch( final Map<String, List<Pointer>> pathTrackingEntries );

}
